2 * Copyright (c) 2019 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
16 #include <vcl/vcl_locked.h>
17 #include <vcl/vcl_private.h>
19 typedef struct vls_shared_data_
23 u32 *workers_subscribed;
24 clib_bitmap_t *listeners;
27 typedef struct vcl_locked_session_
33 u32 shared_data_index;
34 /** VCL session owned by different workers because of migration */
35 u32 owner_vcl_wrk_index;
36 uword *vcl_wrk_index_to_session_index;
37 } vcl_locked_session_t;
39 typedef struct vls_worker_
41 clib_rwlock_t sh_to_vlsh_table_lock; /** valid for multithread workers */
42 vcl_locked_session_t *vls_pool;
43 uword *session_handle_to_vlsh_table;
45 /** Vector of child wrk to cleanup */
46 u32 *pending_wrk_cleanup;
49 typedef struct vls_local_
52 volatile int vls_mt_n_threads;
53 pthread_mutex_t vls_mt_mq_mlock;
54 pthread_mutex_t vls_mt_spool_mlock;
55 volatile u8 select_mp_check;
56 } vls_process_local_t;
58 static vls_process_local_t vls_local;
59 static vls_process_local_t *vlsl = &vls_local;
61 typedef struct vls_main_
63 vls_worker_t *workers;
64 clib_rwlock_t vls_table_lock;
65 /** Pool of data shared by sessions owned by different workers */
66 vls_shared_data_t *shared_data_pool;
67 clib_rwlock_t shared_data_lock;
68 /** Lock to protect rpc among workers */
69 clib_spinlock_t worker_rpc_lock;
77 VLS_RPC_STATE_SUCCESS,
78 VLS_RPC_STATE_SESSION_NOT_EXIST,
81 typedef enum vls_rpc_msg_type_
83 VLS_RPC_CLONE_AND_SHARE,
87 typedef struct vls_rpc_msg_
93 typedef struct vls_clone_and_share_msg_
95 u32 vls_index; /**< vls to be shared */
96 u32 session_index; /**< vcl session to be shared */
97 u32 origin_vls_wrk; /**< vls worker that initiated the rpc */
98 u32 origin_vls_index; /**< vls session of the originator */
99 u32 origin_vcl_wrk; /**< vcl worker that initiated the rpc */
100 u32 origin_session_index; /**< vcl session of the originator */
101 } vls_clone_and_share_msg_t;
103 typedef struct vls_sess_cleanup_msg_
105 u32 session_index; /**< vcl session to be cleaned */
106 u32 origin_vcl_wrk; /**< worker that initiated the rpc */
107 } vls_sess_cleanup_msg_t;
109 void vls_send_session_cleanup_rpc (vcl_worker_t * wrk,
110 u32 dst_wrk_index, u32 dst_session_index);
111 void vls_send_clone_and_share_rpc (vcl_worker_t *wrk, u32 origin_vls_index,
112 u32 session_index, u32 vls_wrk_index,
113 u32 dst_wrk_index, u32 dst_vls_index,
114 u32 dst_session_index);
115 static void vls_cleanup_forked_child (vcl_worker_t *wrk,
116 vcl_worker_t *child_wrk);
117 static void vls_handle_pending_wrk_cleanup (void);
120 vls_get_worker_index (void)
122 if (vls_mt_wrk_supported ())
123 return vlsl->vls_wrk_index;
125 return vcl_get_worker_index ();
129 vls_shared_data_alloc (void)
131 vls_shared_data_t *vls_shd;
134 clib_rwlock_writer_lock (&vlsm->shared_data_lock);
135 pool_get_zero (vlsm->shared_data_pool, vls_shd);
136 clib_spinlock_init (&vls_shd->lock);
137 shd_index = vls_shd - vlsm->shared_data_pool;
138 clib_rwlock_writer_unlock (&vlsm->shared_data_lock);
144 vls_shared_data_index (vls_shared_data_t * vls_shd)
146 return vls_shd - vlsm->shared_data_pool;
150 vls_shared_data_get (u32 shd_index)
152 if (pool_is_free_index (vlsm->shared_data_pool, shd_index))
154 return pool_elt_at_index (vlsm->shared_data_pool, shd_index);
158 vls_shared_data_free (u32 shd_index)
160 vls_shared_data_t *vls_shd;
162 clib_rwlock_writer_lock (&vlsm->shared_data_lock);
163 vls_shd = vls_shared_data_get (shd_index);
164 clib_spinlock_free (&vls_shd->lock);
165 clib_bitmap_free (vls_shd->listeners);
166 vec_free (vls_shd->workers_subscribed);
167 pool_put (vlsm->shared_data_pool, vls_shd);
168 clib_rwlock_writer_unlock (&vlsm->shared_data_lock);
172 vls_shared_data_pool_rlock (void)
174 clib_rwlock_reader_lock (&vlsm->shared_data_lock);
178 vls_shared_data_pool_runlock (void)
180 clib_rwlock_reader_unlock (&vlsm->shared_data_lock);
184 vls_mt_table_rlock (void)
186 if (vlsl->vls_mt_n_threads > 1)
187 clib_rwlock_reader_lock (&vlsm->vls_table_lock);
191 vls_mt_table_runlock (void)
193 if (vlsl->vls_mt_n_threads > 1)
194 clib_rwlock_reader_unlock (&vlsm->vls_table_lock);
198 vls_mt_table_wlock (void)
200 if (vlsl->vls_mt_n_threads > 1)
201 clib_rwlock_writer_lock (&vlsm->vls_table_lock);
205 vls_mt_table_wunlock (void)
207 if (vlsl->vls_mt_n_threads > 1)
208 clib_rwlock_writer_unlock (&vlsm->vls_table_lock);
221 VLS_MT_LOCK_MQ = 1 << 0,
222 VLS_MT_LOCK_SPOOL = 1 << 1
223 } vls_mt_lock_type_t;
228 vlsl->vls_mt_n_threads += 1;
230 /* If multi-thread workers are supported, for each new thread register a new
231 * vcl worker with vpp. Otherwise, all threads use the same vcl worker, so
232 * update the vcl worker's thread local worker index variable */
233 if (vls_mt_wrk_supported ())
235 if (vppcom_worker_register () != VPPCOM_OK)
236 VERR ("failed to register worker");
239 vcl_set_worker_index (vlsl->vls_wrk_index);
243 vls_mt_mq_lock (void)
245 pthread_mutex_lock (&vlsl->vls_mt_mq_mlock);
249 vls_mt_mq_unlock (void)
251 pthread_mutex_unlock (&vlsl->vls_mt_mq_mlock);
255 vls_mt_spool_lock (void)
257 pthread_mutex_lock (&vlsl->vls_mt_spool_mlock);
261 vls_mt_create_unlock (void)
263 pthread_mutex_unlock (&vlsl->vls_mt_spool_mlock);
267 vls_mt_locks_init (void)
269 pthread_mutex_init (&vlsl->vls_mt_mq_mlock, NULL);
270 pthread_mutex_init (&vlsl->vls_mt_spool_mlock, NULL);
274 vls_is_shared (vcl_locked_session_t * vls)
276 return (vls->shared_data_index != ~0);
280 vls_lock (vcl_locked_session_t * vls)
282 if ((vlsl->vls_mt_n_threads > 1) || vls_is_shared (vls))
283 clib_spinlock_lock (&vls->lock);
287 vls_unlock (vcl_locked_session_t * vls)
289 if ((vlsl->vls_mt_n_threads > 1) || vls_is_shared (vls))
290 clib_spinlock_unlock (&vls->lock);
293 static inline vcl_session_handle_t
294 vls_to_sh (vcl_locked_session_t * vls)
296 return vcl_session_handle_from_index (vls->session_index);
299 static inline vcl_session_handle_t
300 vls_to_sh_tu (vcl_locked_session_t * vls)
302 vcl_session_handle_t sh;
303 sh = vls_to_sh (vls);
304 vls_mt_table_runlock ();
308 static vls_worker_t *
309 vls_worker_get_current (void)
311 return pool_elt_at_index (vlsm->workers, vls_get_worker_index ());
315 vls_worker_alloc (void)
319 pool_get_zero (vlsm->workers, wrk);
320 if (vls_mt_wrk_supported ())
321 clib_rwlock_init (&wrk->sh_to_vlsh_table_lock);
322 wrk->wrk_index = vcl_get_worker_index ();
323 vec_validate (wrk->pending_wrk_cleanup, 16);
324 vec_reset_length (wrk->pending_wrk_cleanup);
328 vls_worker_free (vls_worker_t * wrk)
330 hash_free (wrk->session_handle_to_vlsh_table);
331 if (vls_mt_wrk_supported ())
332 clib_rwlock_free (&wrk->sh_to_vlsh_table_lock);
333 pool_free (wrk->vls_pool);
334 pool_put (vlsm->workers, wrk);
337 static vls_worker_t *
338 vls_worker_get (u32 wrk_index)
340 if (pool_is_free_index (vlsm->workers, wrk_index))
342 return pool_elt_at_index (vlsm->workers, wrk_index);
346 vls_sh_to_vlsh_table_add (vls_worker_t *wrk, vcl_session_handle_t sh, u32 vlsh)
348 if (vls_mt_wrk_supported ())
349 clib_rwlock_writer_lock (&wrk->sh_to_vlsh_table_lock);
350 hash_set (wrk->session_handle_to_vlsh_table, sh, vlsh);
351 if (vls_mt_wrk_supported ())
352 clib_rwlock_writer_unlock (&wrk->sh_to_vlsh_table_lock);
356 vls_sh_to_vlsh_table_del (vls_worker_t *wrk, vcl_session_handle_t sh)
358 if (vls_mt_wrk_supported ())
359 clib_rwlock_writer_lock (&wrk->sh_to_vlsh_table_lock);
360 hash_unset (wrk->session_handle_to_vlsh_table, sh);
361 if (vls_mt_wrk_supported ())
362 clib_rwlock_writer_unlock (&wrk->sh_to_vlsh_table_lock);
366 vls_sh_to_vlsh_table_get (vls_worker_t *wrk, vcl_session_handle_t sh)
368 if (vls_mt_wrk_supported ())
369 clib_rwlock_reader_lock (&wrk->sh_to_vlsh_table_lock);
370 uword *vlshp = hash_get (wrk->session_handle_to_vlsh_table, sh);
371 if (vls_mt_wrk_supported ())
372 clib_rwlock_reader_unlock (&wrk->sh_to_vlsh_table_lock);
377 vls_alloc (vcl_session_handle_t sh)
379 vls_worker_t *wrk = vls_worker_get_current ();
380 vcl_locked_session_t *vls;
382 vls_mt_table_wlock ();
384 pool_get_zero (wrk->vls_pool, vls);
385 vls->session_index = vppcom_session_index (sh);
386 vls->worker_index = vppcom_session_worker (sh);
387 vls->vls_index = vls - wrk->vls_pool;
388 vls->shared_data_index = ~0;
389 vls_sh_to_vlsh_table_add (wrk, sh, vls->vls_index);
390 if (vls_mt_wrk_supported ())
392 hash_set (vls->vcl_wrk_index_to_session_index, vls->worker_index,
394 vls->owner_vcl_wrk_index = vls->worker_index;
396 clib_spinlock_init (&vls->lock);
398 vls_mt_table_wunlock ();
399 return vls->vls_index;
402 static vcl_locked_session_t *
403 vls_get (vls_handle_t vlsh)
405 vls_worker_t *wrk = vls_worker_get_current ();
406 if (pool_is_free_index (wrk->vls_pool, vlsh))
408 return pool_elt_at_index (wrk->vls_pool, vlsh);
412 vls_free (vcl_locked_session_t * vls)
414 vls_worker_t *wrk = vls_worker_get_current ();
417 vls_sh_to_vlsh_table_del (
418 wrk, vcl_session_handle_from_index (vls->session_index));
419 clib_spinlock_free (&vls->lock);
420 pool_put (wrk->vls_pool, vls);
423 static vcl_locked_session_t *
424 vls_get_and_lock (vls_handle_t vlsh)
426 vls_worker_t *wrk = vls_worker_get_current ();
427 vcl_locked_session_t *vls;
428 if (pool_is_free_index (wrk->vls_pool, vlsh))
430 vls = pool_elt_at_index (wrk->vls_pool, vlsh);
435 static vcl_locked_session_t *
436 vls_get_w_dlock (vls_handle_t vlsh)
438 vcl_locked_session_t *vls;
439 vls_mt_table_rlock ();
440 vls = vls_get_and_lock (vlsh);
442 vls_mt_table_runlock ();
447 vls_get_and_unlock (vls_handle_t vlsh)
449 vcl_locked_session_t *vls;
450 vls_mt_table_rlock ();
451 vls = vls_get (vlsh);
453 vls_mt_table_runlock ();
457 vls_dunlock (vcl_locked_session_t * vls)
460 vls_mt_table_runlock ();
463 static vcl_locked_session_t *
464 vls_session_get (vls_worker_t * wrk, u32 vls_index)
466 if (pool_is_free_index (wrk->vls_pool, vls_index))
468 return pool_elt_at_index (wrk->vls_pool, vls_index);
472 vlsh_to_sh (vls_handle_t vlsh)
474 vcl_locked_session_t *vls;
477 vls = vls_get_w_dlock (vlsh);
479 return INVALID_SESSION_ID;
480 rv = vls_to_sh (vls);
486 vlsh_to_session_index (vls_handle_t vlsh)
488 vcl_session_handle_t sh;
489 sh = vlsh_to_sh (vlsh);
490 return vppcom_session_index (sh);
494 vls_si_wi_to_vlsh (u32 session_index, u32 vcl_wrk_index)
496 vls_worker_t *wrk = vls_worker_get_current ();
497 uword *vlshp = vls_sh_to_vlsh_table_get (
499 vcl_session_handle_from_wrk_session_index (session_index, vcl_wrk_index));
501 return vlshp ? *vlshp : VLS_INVALID_HANDLE;
505 vls_session_index_to_vlsh (uint32_t session_index)
509 vls_mt_table_rlock ();
510 vlsh = vls_si_wi_to_vlsh (session_index, vcl_get_worker_index ());
511 vls_mt_table_runlock ();
517 vls_is_shared_by_wrk (vcl_locked_session_t * vls, u32 wrk_index)
519 vls_shared_data_t *vls_shd;
522 if (vls->shared_data_index == ~0)
525 vls_shared_data_pool_rlock ();
527 vls_shd = vls_shared_data_get (vls->shared_data_index);
528 clib_spinlock_lock (&vls_shd->lock);
530 for (i = 0; i < vec_len (vls_shd->workers_subscribed); i++)
531 if (vls_shd->workers_subscribed[i] == wrk_index)
533 clib_spinlock_unlock (&vls_shd->lock);
534 vls_shared_data_pool_runlock ();
537 clib_spinlock_unlock (&vls_shd->lock);
539 vls_shared_data_pool_runlock ();
544 vls_listener_wrk_set (vcl_locked_session_t * vls, u32 wrk_index, u8 is_active)
546 vls_shared_data_t *vls_shd;
548 if (vls->shared_data_index == ~0)
550 clib_warning ("not a shared session");
554 vls_shared_data_pool_rlock ();
556 vls_shd = vls_shared_data_get (vls->shared_data_index);
558 clib_spinlock_lock (&vls_shd->lock);
559 clib_bitmap_set (vls_shd->listeners, wrk_index, is_active);
560 clib_spinlock_unlock (&vls_shd->lock);
562 vls_shared_data_pool_runlock ();
566 vls_shared_get_owner (vcl_locked_session_t * vls)
568 vls_shared_data_t *vls_shd;
571 vls_shared_data_pool_rlock ();
573 vls_shd = vls_shared_data_get (vls->shared_data_index);
574 owner_wrk = vls_shd->owner_wrk_index;
576 vls_shared_data_pool_runlock ();
582 vls_listener_wrk_is_active (vcl_locked_session_t * vls, u32 wrk_index)
584 vls_shared_data_t *vls_shd;
587 if (vls->shared_data_index == ~0)
589 clib_warning ("not a shared session");
593 vls_shared_data_pool_rlock ();
595 vls_shd = vls_shared_data_get (vls->shared_data_index);
597 clib_spinlock_lock (&vls_shd->lock);
598 is_set = clib_bitmap_get (vls_shd->listeners, wrk_index);
599 clib_spinlock_unlock (&vls_shd->lock);
601 vls_shared_data_pool_runlock ();
603 return (is_set == 1);
607 vls_listener_wrk_start_listen (vcl_locked_session_t * vls, u32 wrk_index)
609 vppcom_session_listen (vls_to_sh (vls), ~0);
610 vls_listener_wrk_set (vls, wrk_index, 1 /* is_active */ );
614 vls_listener_wrk_stop_listen (vcl_locked_session_t * vls, u32 wrk_index)
619 wrk = vcl_worker_get (wrk_index);
620 s = vcl_session_get (wrk, vls->session_index);
621 if (s->session_state != VCL_STATE_LISTEN)
623 vcl_send_session_unlisten (wrk, s);
624 s->session_state = VCL_STATE_LISTEN_NO_MQ;
625 vls_listener_wrk_set (vls, wrk_index, 0 /* is_active */ );
629 vls_shared_data_subscriber_position (vls_shared_data_t * vls_shd,
634 for (i = 0; i < vec_len (vls_shd->workers_subscribed); i++)
636 if (vls_shd->workers_subscribed[i] == wrk_index)
643 vls_unshare_session (vcl_locked_session_t * vls, vcl_worker_t * wrk)
645 vls_shared_data_t *vls_shd;
646 int do_disconnect, pos;
650 if (vls->shared_data_index == ~0)
653 s = vcl_session_get (wrk, vls->session_index);
654 if (s->session_state == VCL_STATE_LISTEN)
655 vls_listener_wrk_set (vls, wrk->wrk_index, 0 /* is_active */ );
657 vls_shared_data_pool_rlock ();
659 vls_shd = vls_shared_data_get (vls->shared_data_index);
660 clib_spinlock_lock (&vls_shd->lock);
662 pos = vls_shared_data_subscriber_position (vls_shd, wrk->wrk_index);
665 clib_warning ("worker %u not subscribed for vls %u", wrk->wrk_index,
671 * Unsubscribe from share data and fifos
675 svm_fifo_del_subscriber (s->rx_fifo, wrk->vpp_wrk_index);
676 svm_fifo_del_subscriber (s->tx_fifo, wrk->vpp_wrk_index);
678 vec_del1 (vls_shd->workers_subscribed, pos);
683 n_subscribers = vec_len (vls_shd->workers_subscribed);
684 do_disconnect = s->session_state == VCL_STATE_LISTEN || !n_subscribers;
685 vcl_session_cleanup (wrk, s, vcl_session_handle (s), do_disconnect);
688 * No subscriber left, cleanup shared data
692 u32 shd_index = vls_shared_data_index (vls_shd);
694 clib_spinlock_unlock (&vls_shd->lock);
695 vls_shared_data_pool_runlock ();
697 vls_shared_data_free (shd_index);
699 /* All locks have been dropped */
703 /* Return, if this is not the owning worker */
704 if (vls_shd->owner_wrk_index != wrk->wrk_index)
707 ASSERT (vec_len (vls_shd->workers_subscribed));
710 * Check if we can change owner or close
712 vls_shd->owner_wrk_index = vls_shd->workers_subscribed[0];
713 vcl_send_session_worker_update (wrk, s, vls_shd->owner_wrk_index);
715 /* XXX is this still needed? */
716 if (vec_len (vls_shd->workers_subscribed) > 1)
717 clib_warning ("more workers need to be updated");
721 clib_spinlock_unlock (&vls_shd->lock);
722 vls_shared_data_pool_runlock ();
728 vls_init_share_session (vls_worker_t * vls_wrk, vcl_locked_session_t * vls)
730 vls_shared_data_t *vls_shd;
732 u32 vls_shd_index = vls_shared_data_alloc ();
734 vls_shared_data_pool_rlock ();
736 vls_shd = vls_shared_data_get (vls_shd_index);
737 vls_shd->owner_wrk_index = vls_wrk->wrk_index;
738 vls->shared_data_index = vls_shd_index;
739 vec_add1 (vls_shd->workers_subscribed, vls_wrk->wrk_index);
741 vls_shared_data_pool_runlock ();
745 vls_share_session (vls_worker_t * vls_wrk, vcl_locked_session_t * vls)
747 vcl_worker_t *vcl_wrk = vcl_worker_get (vls_wrk->wrk_index);
748 vls_shared_data_t *vls_shd;
751 s = vcl_session_get (vcl_wrk, vls->session_index);
754 clib_warning ("wrk %u session %u vls %u NOT AVAILABLE",
755 vcl_wrk->wrk_index, vls->session_index, vls->vls_index);
759 ASSERT (vls->shared_data_index != ~0);
761 /* Reinit session lock */
762 clib_spinlock_init (&vls->lock);
764 vls_shared_data_pool_rlock ();
766 vls_shd = vls_shared_data_get (vls->shared_data_index);
768 clib_spinlock_lock (&vls_shd->lock);
769 vec_add1 (vls_shd->workers_subscribed, vls_wrk->wrk_index);
770 clib_spinlock_unlock (&vls_shd->lock);
772 vls_shared_data_pool_runlock ();
776 vcl_session_share_fifos (s, s->rx_fifo, s->tx_fifo);
778 else if (s->session_state == VCL_STATE_LISTEN)
780 s->session_state = VCL_STATE_LISTEN_NO_MQ;
785 vls_share_sessions (vls_worker_t * vls_parent_wrk, vls_worker_t * vls_wrk)
787 vcl_locked_session_t *vls, *parent_vls;
790 pool_foreach (vls, vls_wrk->vls_pool) {
791 /* Initialize sharing on parent session */
792 if (vls->shared_data_index == ~0)
794 parent_vls = vls_session_get (vls_parent_wrk, vls->vls_index);
795 vls_init_share_session (vls_parent_wrk, parent_vls);
796 vls->shared_data_index = parent_vls->shared_data_index;
798 vls_share_session (vls_wrk, vls);
804 vls_worker_copy_on_fork (vcl_worker_t * parent_wrk)
806 vls_worker_t *vls_wrk = vls_worker_get_current (), *vls_parent_wrk;
807 vcl_worker_t *wrk = vcl_worker_get_current ();
808 u32 vls_index, session_index, wrk_index;
809 vcl_session_handle_t sh;
814 wrk->sessions = pool_dup (parent_wrk->sessions);
815 wrk->session_index_by_vpp_handles =
816 hash_dup (parent_wrk->session_index_by_vpp_handles);
821 vls_parent_wrk = vls_worker_get (parent_wrk->wrk_index);
823 hash_foreach (sh, vls_index, vls_parent_wrk->session_handle_to_vlsh_table,
825 vcl_session_handle_parse (sh, &wrk_index, &session_index);
826 hash_set (vls_wrk->session_handle_to_vlsh_table,
827 vcl_session_handle_from_index (session_index), vls_index);
830 vls_wrk->vls_pool = pool_dup (vls_parent_wrk->vls_pool);
832 vls_share_sessions (vls_parent_wrk, vls_wrk);
836 vls_mt_acq_locks (vcl_locked_session_t * vls, vls_mt_ops_t op, int *locks_acq)
838 vcl_worker_t *wrk = vcl_worker_get_current ();
839 vcl_session_t *s = 0;
844 s = vcl_session_get (wrk, vls->session_index);
845 if (PREDICT_FALSE (!s))
847 is_nonblk = vcl_session_has_attr (s, VCL_SESS_ATTR_NONBLOCK);
854 is_nonblk = vcl_session_read_ready (s) != 0;
858 *locks_acq |= VLS_MT_LOCK_MQ;
861 case VLS_MT_OP_WRITE:
864 is_nonblk = vcl_session_write_ready (s) != 0;
868 *locks_acq |= VLS_MT_LOCK_MQ;
871 case VLS_MT_OP_XPOLL:
873 *locks_acq |= VLS_MT_LOCK_MQ;
875 case VLS_MT_OP_SPOOL:
876 vls_mt_spool_lock ();
877 *locks_acq |= VLS_MT_LOCK_SPOOL;
885 vls_mt_rel_locks (int locks_acq)
887 if (locks_acq & VLS_MT_LOCK_MQ)
889 if (locks_acq & VLS_MT_LOCK_SPOOL)
890 vls_mt_create_unlock ();
894 vls_mt_session_should_migrate (vcl_locked_session_t * vls)
896 return (vls_mt_wrk_supported ()
897 && vls->worker_index != vcl_get_worker_index ());
900 static vcl_locked_session_t *
901 vls_mt_session_migrate (vcl_locked_session_t *vls)
903 u32 wrk_index = vcl_get_worker_index ();
905 vls_worker_t *vls_wrk = vls_worker_get_current ();
906 u32 src_sid, sid, vls_index, own_vcl_wrk_index;
907 vcl_session_t *session;
910 ASSERT (vls_mt_wrk_supported () && vls->worker_index != wrk_index);
913 * VCL session on current vcl worker already allocated. Update current
914 * owner worker and index and return
916 if ((p = hash_get (vls->vcl_wrk_index_to_session_index, wrk_index)))
918 vls->worker_index = wrk_index;
919 vls->session_index = (u32) p[0];
924 * Ask vcl worker that owns the original vcl session to clone it into
925 * current vcl worker session pool
928 if (!(p = hash_get (vls->vcl_wrk_index_to_session_index,
929 vls->owner_vcl_wrk_index)))
931 VERR ("session in owner worker(%u) is free", vls->owner_vcl_wrk_index);
934 vls_mt_table_runlock ();
938 src_sid = (u32) p[0];
939 wrk = vcl_worker_get_current ();
940 session = vcl_session_alloc (wrk);
941 sid = session->session_index;
942 VDBG (1, "migrate session of worker (session): %u (%u) -> %u (%u)",
943 vls->owner_vcl_wrk_index, src_sid, wrk_index, sid);
945 /* Drop lock to prevent dead lock when dst wrk trying to get lock. */
946 vls_index = vls->vls_index;
947 own_vcl_wrk_index = vls->owner_vcl_wrk_index;
949 vls_mt_table_runlock ();
950 vls_send_clone_and_share_rpc (wrk, vls_index, sid, vls_get_worker_index (),
951 own_vcl_wrk_index, vls_index, src_sid);
953 if (PREDICT_FALSE (wrk->rpc_done == VLS_RPC_STATE_SESSION_NOT_EXIST))
955 VWRN ("session %u not exist", src_sid);
958 else if (PREDICT_FALSE (wrk->rpc_done == VLS_RPC_STATE_INIT))
960 VWRN ("failed to wait rpc response");
963 else if (PREDICT_FALSE ((session->flags & VCL_SESSION_F_IS_VEP) &&
964 session->vep.next_sh != ~0))
966 VERR ("can't migrate nonempty epoll session");
970 else if (PREDICT_FALSE (!(session->flags & VCL_SESSION_F_IS_VEP) &&
971 session->session_state != VCL_STATE_CLOSED))
973 VERR ("migrate NOT supported, session_status (%u)",
974 session->session_state);
979 vls = vls_get_w_dlock (vls_index);
980 if (PREDICT_FALSE (!vls))
982 VWRN ("failed to get vls %u", vls_index);
986 session->session_index = sid;
987 vls->worker_index = wrk_index;
988 vls->session_index = sid;
989 hash_set (vls->vcl_wrk_index_to_session_index, wrk_index, sid);
990 vls_sh_to_vlsh_table_add (vls_wrk, vcl_session_handle (session),
995 vcl_session_free (wrk, session);
1000 vls_mt_detect (void)
1002 if (PREDICT_FALSE (vcl_get_worker_index () == ~0))
1006 #define vls_mt_guard(_vls, _op) \
1007 int _locks_acq = 0; \
1008 if (vls_mt_wrk_supported ()) \
1010 if (PREDICT_FALSE (_vls && \
1011 ((vcl_locked_session_t *) _vls)->worker_index != \
1012 vcl_get_worker_index ())) \
1014 _vls = vls_mt_session_migrate (_vls); \
1015 if (PREDICT_FALSE (!_vls)) \
1016 return VPPCOM_EBADFD; \
1021 if (PREDICT_FALSE (vlsl->vls_mt_n_threads > 1)) \
1022 vls_mt_acq_locks (_vls, _op, &_locks_acq); \
1025 #define vls_mt_unguard() \
1026 if (PREDICT_FALSE (_locks_acq)) \
1027 vls_mt_rel_locks (_locks_acq)
1030 vls_write (vls_handle_t vlsh, void *buf, size_t nbytes)
1032 vcl_locked_session_t *vls;
1036 if (!(vls = vls_get_w_dlock (vlsh)))
1037 return VPPCOM_EBADFD;
1039 vls_mt_guard (vls, VLS_MT_OP_WRITE);
1040 rv = vppcom_session_write (vls_to_sh_tu (vls), buf, nbytes);
1042 vls_get_and_unlock (vlsh);
1047 vls_write_msg (vls_handle_t vlsh, void *buf, size_t nbytes)
1049 vcl_locked_session_t *vls;
1053 if (!(vls = vls_get_w_dlock (vlsh)))
1054 return VPPCOM_EBADFD;
1055 vls_mt_guard (vls, VLS_MT_OP_WRITE);
1056 rv = vppcom_session_write_msg (vls_to_sh_tu (vls), buf, nbytes);
1058 vls_get_and_unlock (vlsh);
1063 vls_sendto (vls_handle_t vlsh, void *buf, int buflen, int flags,
1064 vppcom_endpt_t * ep)
1066 vcl_locked_session_t *vls;
1070 if (!(vls = vls_get_w_dlock (vlsh)))
1071 return VPPCOM_EBADFD;
1072 vls_mt_guard (vls, VLS_MT_OP_WRITE);
1073 rv = vppcom_session_sendto (vls_to_sh_tu (vls), buf, buflen, flags, ep);
1075 vls_get_and_unlock (vlsh);
1080 vls_read (vls_handle_t vlsh, void *buf, size_t nbytes)
1082 vcl_locked_session_t *vls;
1086 if (!(vls = vls_get_w_dlock (vlsh)))
1087 return VPPCOM_EBADFD;
1088 vls_mt_guard (vls, VLS_MT_OP_READ);
1089 rv = vppcom_session_read (vls_to_sh_tu (vls), buf, nbytes);
1091 vls_get_and_unlock (vlsh);
1096 vls_recvfrom (vls_handle_t vlsh, void *buffer, uint32_t buflen, int flags,
1097 vppcom_endpt_t * ep)
1099 vcl_locked_session_t *vls;
1103 if (!(vls = vls_get_w_dlock (vlsh)))
1104 return VPPCOM_EBADFD;
1105 vls_mt_guard (vls, VLS_MT_OP_READ);
1106 rv = vppcom_session_recvfrom (vls_to_sh_tu (vls), buffer, buflen, flags,
1109 vls_get_and_unlock (vlsh);
1114 vls_attr (vls_handle_t vlsh, uint32_t op, void *buffer, uint32_t * buflen)
1116 vcl_locked_session_t *vls;
1120 if (!(vls = vls_get_w_dlock (vlsh)))
1121 return VPPCOM_EBADFD;
1122 if (vls_mt_session_should_migrate (vls))
1124 vls = vls_mt_session_migrate (vls);
1125 if (PREDICT_FALSE (!vls))
1126 return VPPCOM_EBADFD;
1128 rv = vppcom_session_attr (vls_to_sh_tu (vls), op, buffer, buflen);
1129 vls_get_and_unlock (vlsh);
1134 vls_bind (vls_handle_t vlsh, vppcom_endpt_t * ep)
1136 vcl_locked_session_t *vls;
1140 if (!(vls = vls_get_w_dlock (vlsh)))
1141 return VPPCOM_EBADFD;
1142 rv = vppcom_session_bind (vls_to_sh_tu (vls), ep);
1143 vls_get_and_unlock (vlsh);
1148 vls_listen (vls_handle_t vlsh, int q_len)
1150 vcl_locked_session_t *vls;
1154 if (!(vls = vls_get_w_dlock (vlsh)))
1155 return VPPCOM_EBADFD;
1156 vls_mt_guard (vls, VLS_MT_OP_XPOLL);
1157 rv = vppcom_session_listen (vls_to_sh_tu (vls), q_len);
1159 vls_get_and_unlock (vlsh);
1164 vls_connect (vls_handle_t vlsh, vppcom_endpt_t * server_ep)
1166 vcl_locked_session_t *vls;
1170 if (!(vls = vls_get_w_dlock (vlsh)))
1171 return VPPCOM_EBADFD;
1172 vls_mt_guard (vls, VLS_MT_OP_XPOLL);
1173 rv = vppcom_session_connect (vls_to_sh_tu (vls), server_ep);
1175 vls_get_and_unlock (vlsh);
1180 vls_mp_checks (vcl_locked_session_t * vls, int is_add)
1182 vcl_worker_t *wrk = vcl_worker_get_current ();
1186 if (vls_mt_wrk_supported ())
1189 s = vcl_session_get (wrk, vls->session_index);
1190 switch (s->session_state)
1192 case VCL_STATE_LISTEN:
1195 vls_listener_wrk_set (vls, vls->worker_index, 1 /* is_active */ );
1198 vls_listener_wrk_stop_listen (vls, vls->worker_index);
1200 case VCL_STATE_LISTEN_NO_MQ:
1204 /* Register worker as listener */
1205 vls_listener_wrk_start_listen (vls, wrk->wrk_index);
1207 /* If owner worker did not attempt to accept/xpoll on the session,
1208 * force a listen stop for it, since it may not be interested in
1209 * accepting new sessions.
1210 * This is pretty much a hack done to give app workers the illusion
1211 * that it is fine to listen and not accept new sessions for a
1212 * given listener. Without it, we would accumulate unhandled
1213 * accepts on the passive worker message queue. */
1214 owner_wrk = vls_shared_get_owner (vls);
1215 if (!vls_listener_wrk_is_active (vls, owner_wrk))
1216 vls_listener_wrk_stop_listen (vls, owner_wrk);
1224 vls_accept (vls_handle_t listener_vlsh, vppcom_endpt_t * ep, int flags)
1226 vls_handle_t accepted_vlsh;
1227 vcl_locked_session_t *vls;
1231 if (!(vls = vls_get_w_dlock (listener_vlsh)))
1232 return VPPCOM_EBADFD;
1233 if (vcl_n_workers () > 1)
1234 vls_mp_checks (vls, 1 /* is_add */ );
1235 vls_mt_guard (vls, VLS_MT_OP_SPOOL);
1236 sh = vppcom_session_accept (vls_to_sh_tu (vls), ep, flags);
1238 vls_get_and_unlock (listener_vlsh);
1241 accepted_vlsh = vls_alloc (sh);
1242 if (PREDICT_FALSE (accepted_vlsh == VLS_INVALID_HANDLE))
1243 vppcom_session_close (sh);
1244 return accepted_vlsh;
1248 vls_create (uint8_t proto, uint8_t is_nonblocking)
1250 vcl_session_handle_t sh;
1252 vcl_locked_session_t *vls = NULL;
1255 vls_mt_guard (vls, VLS_MT_OP_SPOOL);
1256 sh = vppcom_session_create (proto, is_nonblocking);
1258 if (sh == INVALID_SESSION_ID)
1259 return VLS_INVALID_HANDLE;
1261 vlsh = vls_alloc (sh);
1262 if (PREDICT_FALSE (vlsh == VLS_INVALID_HANDLE))
1263 vppcom_session_close (sh);
1269 vls_mt_session_cleanup (vcl_locked_session_t * vls)
1271 u32 session_index, wrk_index, current_vcl_wrk;
1272 vcl_worker_t *wrk = vcl_worker_get_current ();
1274 ASSERT (vls_mt_wrk_supported ());
1276 current_vcl_wrk = vcl_get_worker_index ();
1279 hash_foreach (wrk_index, session_index, vls->vcl_wrk_index_to_session_index,
1281 if (current_vcl_wrk != wrk_index)
1282 vls_send_session_cleanup_rpc (wrk, wrk_index, session_index);
1285 hash_free (vls->vcl_wrk_index_to_session_index);
1289 vls_close (vls_handle_t vlsh)
1291 vcl_locked_session_t *vls;
1295 vls_mt_table_wlock ();
1297 vls = vls_get_and_lock (vlsh);
1300 vls_mt_table_wunlock ();
1301 return VPPCOM_EBADFD;
1304 vls_mt_guard (vls, VLS_MT_OP_SPOOL);
1306 if (vls_is_shared (vls))
1307 rv = vls_unshare_session (vls, vcl_worker_get_current ());
1309 rv = vppcom_session_close (vls_to_sh (vls));
1311 if (vls_mt_wrk_supported ())
1312 vls_mt_session_cleanup (vls);
1317 vls_mt_table_wunlock ();
1323 vls_shutdown (vls_handle_t vlsh, int how)
1325 vcl_locked_session_t *vls;
1329 if (!(vls = vls_get_w_dlock (vlsh)))
1330 return VPPCOM_EBADFD;
1332 vls_mt_guard (vls, VLS_MT_OP_SPOOL);
1333 rv = vppcom_session_shutdown (vls_to_sh (vls), how);
1335 vls_get_and_unlock (vlsh);
1341 vls_epoll_create (void)
1343 vcl_session_handle_t sh;
1348 sh = vppcom_epoll_create ();
1349 if (sh == INVALID_SESSION_ID)
1350 return VLS_INVALID_HANDLE;
1352 vlsh = vls_alloc (sh);
1353 if (vlsh == VLS_INVALID_HANDLE)
1354 vppcom_session_close (sh);
1360 vls_epoll_ctl_mp_checks (vcl_locked_session_t * vls, int op)
1362 if (vcl_n_workers () <= 1 || op == EPOLL_CTL_MOD)
1365 vls_mp_checks (vls, op == EPOLL_CTL_ADD);
1369 vls_epoll_ctl (vls_handle_t ep_vlsh, int op, vls_handle_t vlsh,
1370 struct epoll_event *event)
1372 vcl_locked_session_t *ep_vls, *vls;
1373 vcl_session_handle_t ep_sh, sh;
1377 vls_mt_table_rlock ();
1378 ep_vls = vls_get_and_lock (ep_vlsh);
1380 if (vls_mt_session_should_migrate (ep_vls))
1382 ep_vls = vls_mt_session_migrate (ep_vls);
1383 if (PREDICT_FALSE (!ep_vls))
1384 return VPPCOM_EBADFD;
1387 ep_sh = vls_to_sh (ep_vls);
1388 vls = vls_get_and_lock (vlsh);
1389 sh = vls_to_sh (vls);
1391 vls_epoll_ctl_mp_checks (vls, op);
1392 vls_mt_table_runlock ();
1393 rv = vppcom_epoll_ctl (ep_sh, op, sh, event);
1395 vls_mt_table_rlock ();
1396 ep_vls = vls_get (ep_vlsh);
1397 vls = vls_get (vlsh);
1399 vls_unlock (ep_vls);
1400 vls_mt_table_runlock ();
1405 vls_epoll_wait (vls_handle_t ep_vlsh, struct epoll_event *events,
1406 int maxevents, double wait_for_time)
1408 vcl_locked_session_t *vls, *vls_tmp = NULL;
1412 if (!(vls = vls_get_w_dlock (ep_vlsh)))
1413 return VPPCOM_EBADFD;
1414 vls_mt_guard (vls_tmp, VLS_MT_OP_XPOLL);
1415 rv = vppcom_epoll_wait (vls_to_sh_tu (vls), events, maxevents,
1418 vls_get_and_unlock (ep_vlsh);
1419 vls_handle_pending_wrk_cleanup ();
1424 vls_select_mp_checks (vcl_si_set * read_map)
1426 vcl_locked_session_t *vls;
1431 if (vcl_n_workers () <= 1)
1433 vlsl->select_mp_check = 1;
1440 vlsl->select_mp_check = 1;
1441 wrk = vcl_worker_get_current ();
1444 clib_bitmap_foreach (si, read_map) {
1445 s = vcl_session_get (wrk, si);
1446 if (s->session_state == VCL_STATE_LISTEN)
1448 vls = vls_get (vls_session_index_to_vlsh (si));
1449 vls_mp_checks (vls, 1 /* is_add */);
1456 vls_select (int n_bits, vcl_si_set * read_map, vcl_si_set * write_map,
1457 vcl_si_set * except_map, double wait_for_time)
1460 vcl_locked_session_t *vls = NULL;
1463 vls_mt_guard (vls, VLS_MT_OP_XPOLL);
1464 if (PREDICT_FALSE (!vlsl->select_mp_check))
1465 vls_select_mp_checks (read_map);
1466 rv = vppcom_select (n_bits, read_map, write_map, except_map, wait_for_time);
1468 vls_handle_pending_wrk_cleanup ();
1473 vls_unshare_vcl_worker_sessions (vcl_worker_t * wrk)
1475 u32 current_wrk, is_current;
1476 vcl_locked_session_t *vls;
1479 if (pool_elts (vcm->workers) <= 1)
1482 current_wrk = vcl_get_worker_index ();
1483 is_current = current_wrk == wrk->wrk_index;
1486 pool_foreach (s, wrk->sessions) {
1487 vls = vls_get (vls_si_wi_to_vlsh (s->session_index, wrk->wrk_index));
1488 if (vls && (is_current || vls_is_shared_by_wrk (vls, current_wrk)))
1489 vls_unshare_session (vls, wrk);
1495 vls_cleanup_vcl_worker (vcl_worker_t * wrk)
1497 vls_worker_t *vls_wrk = vls_worker_get (wrk->wrk_index);
1499 /* Unshare sessions and also cleanup worker since child may have
1500 * called _exit () and therefore vcl may not catch the event */
1501 vls_unshare_vcl_worker_sessions (wrk);
1502 vcl_worker_cleanup (wrk, 1 /* notify vpp */ );
1504 vls_worker_free (vls_wrk);
1508 vls_cleanup_forked_child (vcl_worker_t * wrk, vcl_worker_t * child_wrk)
1510 vcl_worker_t *sub_child;
1513 if (child_wrk->forked_child != ~0)
1515 sub_child = vcl_worker_get_if_valid (child_wrk->forked_child);
1518 /* Wait a bit, maybe the process is going away */
1519 while (kill (sub_child->current_pid, 0) >= 0 && tries++ < 50)
1521 if (kill (sub_child->current_pid, 0) < 0)
1522 vls_cleanup_forked_child (child_wrk, sub_child);
1525 vls_cleanup_vcl_worker (child_wrk);
1526 VDBG (0, "Cleaned up forked child wrk %u", child_wrk->wrk_index);
1527 wrk->forked_child = ~0;
1531 vls_handle_pending_wrk_cleanup (void)
1534 vcl_worker_t *child_wrk, *wrk;
1535 vls_worker_t *vls_wrk = vls_worker_get_current ();
1537 if (PREDICT_TRUE (vec_len (vls_wrk->pending_wrk_cleanup) == 0))
1540 wrk = vcl_worker_get_current ();
1541 vec_foreach (wip, vls_wrk->pending_wrk_cleanup)
1543 child_wrk = vcl_worker_get_if_valid (*wip);
1546 vls_cleanup_forked_child (wrk, child_wrk);
1548 vec_reset_length (vls_wrk->pending_wrk_cleanup);
1551 static struct sigaction old_sa;
1554 vls_intercept_sigchld_handler (int signum, siginfo_t * si, void *uc)
1556 vcl_worker_t *wrk, *child_wrk;
1557 vls_worker_t *vls_wrk;
1559 if (vcl_get_worker_index () == ~0)
1562 if (sigaction (SIGCHLD, &old_sa, 0))
1564 VERR ("couldn't restore sigchld");
1568 wrk = vcl_worker_get_current ();
1569 if (wrk->forked_child == ~0)
1572 child_wrk = vcl_worker_get_if_valid (wrk->forked_child);
1576 if (si && si->si_pid != child_wrk->current_pid)
1578 VDBG (0, "unexpected child pid %u", si->si_pid);
1582 /* Parent process may enter sighandler with a lock, such as lock in localtime
1583 * or in mspace_free, and child wrk cleanup may try to get such locks and
1585 * So move child wrk cleanup from sighandler to vls_epoll_wait/vls_select.
1587 vls_wrk = vls_worker_get_current ();
1588 vec_add1 (vls_wrk->pending_wrk_cleanup, child_wrk->wrk_index);
1591 if (old_sa.sa_flags & SA_SIGINFO)
1593 void (*fn) (int, siginfo_t *, void *) = old_sa.sa_sigaction;
1594 fn (signum, si, uc);
1598 void (*fn) (int) = old_sa.sa_handler;
1605 vls_incercept_sigchld ()
1607 struct sigaction sa;
1608 if (old_sa.sa_sigaction)
1610 VDBG (0, "have intercepted sigchld");
1613 clib_memset (&sa, 0, sizeof (sa));
1614 sa.sa_sigaction = vls_intercept_sigchld_handler;
1615 sa.sa_flags = SA_SIGINFO;
1616 if (sigaction (SIGCHLD, &sa, &old_sa))
1618 VERR ("couldn't intercept sigchld");
1624 vls_app_pre_fork (void)
1626 vls_incercept_sigchld ();
1627 vcl_flush_mq_events ();
1631 vls_app_fork_child_handler (void)
1633 vcl_worker_t *parent_wrk;
1634 int parent_wrk_index;
1636 parent_wrk_index = vcl_get_worker_index ();
1637 VDBG (0, "initializing forked child %u with parent wrk %u", getpid (),
1643 vcl_set_worker_index (~0);
1646 * Allocate and register vcl worker with vpp
1648 if (vppcom_worker_register ())
1650 VERR ("couldn't register new worker!");
1655 * Allocate/initialize vls worker and share sessions
1657 vls_worker_alloc ();
1658 parent_wrk = vcl_worker_get (parent_wrk_index);
1659 vls_worker_copy_on_fork (parent_wrk);
1660 parent_wrk->forked_child = vcl_get_worker_index ();
1662 /* Reset number of threads and set wrk index */
1663 vlsl->vls_mt_n_threads = 0;
1664 vlsl->vls_wrk_index = vcl_get_worker_index ();
1665 vlsl->select_mp_check = 0;
1666 vls_mt_locks_init ();
1668 VDBG (0, "forked child main worker initialized");
1673 vls_app_fork_parent_handler (void)
1676 while (vcm->forking)
1683 vls_worker_t *wrk = vls_worker_get_current ();
1685 /* Handle pending wrk cleanup */
1686 vls_handle_pending_wrk_cleanup ();
1688 /* Unshare the sessions. VCL will clean up the worker */
1689 vls_unshare_vcl_worker_sessions (vcl_worker_get_current ());
1690 vls_worker_free (wrk);
1694 vls_clone_and_share_rpc_handler (void *args)
1696 vls_clone_and_share_msg_t *msg = (vls_clone_and_share_msg_t *) args;
1697 vls_worker_t *wrk = vls_worker_get_current (), *dst_wrk;
1698 vcl_locked_session_t *vls, *dst_vls;
1699 vcl_worker_t *vcl_wrk = vcl_worker_get_current (), *dst_vcl_wrk;
1700 vcl_session_t *s, *dst_s;
1702 VDBG (1, "process session clone of worker (session): %u (%u) -> %u (%u)",
1703 vcl_wrk->wrk_index, msg->session_index, msg->origin_vcl_wrk,
1704 msg->origin_session_index);
1706 /* VCL locked session can't been protected, so DONT touch it.
1707 * VCL session may been free, check it.
1709 dst_vcl_wrk = vcl_worker_get (msg->origin_vcl_wrk);
1710 s = vcl_session_get (vcl_wrk, msg->session_index);
1711 if (PREDICT_FALSE (!s))
1713 dst_vcl_wrk->rpc_done = VLS_RPC_STATE_SESSION_NOT_EXIST;
1717 if (!vls_mt_wrk_supported ())
1719 vls = vls_session_get (wrk, msg->vls_index);
1720 vls_init_share_session (wrk, vls);
1721 dst_wrk = vls_worker_get (msg->origin_vls_wrk);
1722 dst_vls = vls_session_get (dst_wrk, msg->origin_vls_index);
1723 dst_vls->shared_data_index = vls->shared_data_index;
1725 dst_s = vcl_session_get (dst_vcl_wrk, msg->origin_session_index);
1726 clib_memcpy (dst_s, s, sizeof (*s));
1728 dst_vcl_wrk->rpc_done = VLS_RPC_STATE_SUCCESS;
1732 vls_session_cleanup_rpc_handler (void *args)
1734 vls_sess_cleanup_msg_t *msg = (vls_sess_cleanup_msg_t *) args;
1735 vcl_worker_t *wrk = vcl_worker_get_current ();
1736 vls_worker_t *vls_wrk = vls_worker_get_current ();
1737 vcl_session_handle_t sh = vcl_session_handle_from_index (msg->session_index);
1739 VDBG (1, "process session cleanup of worker (session): %u (%u) from %u ()",
1740 wrk->wrk_index, msg->session_index, msg->origin_vcl_wrk);
1742 vppcom_session_close (sh);
1743 vls_sh_to_vlsh_table_del (vls_wrk, sh);
1747 vls_rpc_handler (void *args)
1749 vls_rpc_msg_t *msg = (vls_rpc_msg_t *) args;
1752 case VLS_RPC_CLONE_AND_SHARE:
1753 vls_clone_and_share_rpc_handler (msg->data);
1755 case VLS_RPC_SESS_CLEANUP:
1756 vls_session_cleanup_rpc_handler (msg->data);
1764 vls_send_clone_and_share_rpc (vcl_worker_t *wrk, u32 origin_vls_index,
1765 u32 session_index, u32 vls_wrk_index,
1766 u32 dst_wrk_index, u32 dst_vls_index,
1767 u32 dst_session_index)
1769 u8 data[sizeof (u8) + sizeof (vls_clone_and_share_msg_t)];
1770 vls_clone_and_share_msg_t *msg;
1773 f64 timeout = clib_time_now (&wrk->clib_time) + VLS_WORKER_RPC_TIMEOUT;
1775 rpc = (vls_rpc_msg_t *) & data;
1776 rpc->type = VLS_RPC_CLONE_AND_SHARE;
1777 msg = (vls_clone_and_share_msg_t *) & rpc->data;
1778 msg->origin_vls_wrk = vls_wrk_index;
1779 msg->origin_vls_index = origin_vls_index;
1780 msg->origin_vcl_wrk = wrk->wrk_index;
1781 msg->origin_session_index = session_index;
1782 msg->vls_index = dst_vls_index;
1783 msg->session_index = dst_session_index;
1785 /* Try lock and handle rpcs if two threads send each other
1786 * clone requests at the same time.
1788 wrk->rpc_done = VLS_RPC_STATE_INIT;
1789 while (!clib_spinlock_trylock (&vlsm->worker_rpc_lock))
1790 vcl_flush_mq_events ();
1791 ret = vcl_send_worker_rpc (dst_wrk_index, rpc, sizeof (data));
1793 VDBG (1, "send session clone to wrk (session): %u (%u) -> %u (%u), ret=%d",
1794 dst_wrk_index, msg->session_index, msg->origin_vcl_wrk,
1795 msg->origin_session_index, ret);
1796 while (!ret && wrk->rpc_done == VLS_RPC_STATE_INIT &&
1797 clib_time_now (&wrk->clib_time) < timeout)
1799 clib_spinlock_unlock (&vlsm->worker_rpc_lock);
1803 vls_send_session_cleanup_rpc (vcl_worker_t * wrk,
1804 u32 dst_wrk_index, u32 dst_session_index)
1806 u8 data[sizeof (u8) + sizeof (vls_sess_cleanup_msg_t)];
1807 vls_sess_cleanup_msg_t *msg;
1811 rpc = (vls_rpc_msg_t *) & data;
1812 rpc->type = VLS_RPC_SESS_CLEANUP;
1813 msg = (vls_sess_cleanup_msg_t *) & rpc->data;
1814 msg->origin_vcl_wrk = wrk->wrk_index;
1815 msg->session_index = dst_session_index;
1817 ret = vcl_send_worker_rpc (dst_wrk_index, rpc, sizeof (data));
1819 VDBG (1, "send session cleanup to wrk (session): %u (%u) from %u, ret=%d",
1820 dst_wrk_index, msg->session_index, msg->origin_vcl_wrk, ret);
1824 vls_app_create (char *app_name)
1828 if ((rv = vppcom_app_create (app_name)))
1831 vlsm = clib_mem_alloc (sizeof (vls_main_t));
1832 clib_memset (vlsm, 0, sizeof (*vlsm));
1833 clib_rwlock_init (&vlsm->vls_table_lock);
1834 clib_rwlock_init (&vlsm->shared_data_lock);
1835 clib_spinlock_init (&vlsm->worker_rpc_lock);
1836 pool_alloc (vlsm->workers, vcm->cfg.max_workers);
1838 pthread_atfork (vls_app_pre_fork, vls_app_fork_parent_handler,
1839 vls_app_fork_child_handler);
1840 atexit (vls_app_exit);
1841 vls_worker_alloc ();
1842 vlsl->vls_wrk_index = vcl_get_worker_index ();
1843 vls_mt_locks_init ();
1844 vcm->wrk_rpc_fn = vls_rpc_handler;
1849 vls_use_eventfd (void)
1851 return vcm->cfg.use_mq_eventfd;
1855 vls_mt_wrk_supported (void)
1857 return vcm->cfg.mt_wrk_supported;
1861 vls_use_real_epoll (void)
1863 if (vcl_get_worker_index () == ~0)
1866 return vcl_worker_get_current ()->vcl_needs_real_epoll;
1870 vls_register_vcl_worker (void)
1876 * fd.io coding-style-patch-verification: ON
1879 * eval: (c-set-style "gnu")